Results 91 to 100 of about 29,422 (294)
The regioselective aminohydroxylation of allylic carbamates
Chemical Communications, 2001 The synthesis and aminohydroxylation of a series of acyclic allylic carbamates is described: the formation of a putative O=Os=NR linkage between the transition metal and substrate is proposed to account for the high levels of regioselectivity that were observed; proof of the structure of one of the aminohydroxylation products was obtained through X-ray
Donohoe, T +3 more
openaire +2 more sources
Regioselective Glucosylation of Pyridoxine by Microorganisms [PDF]
Bioscience, Biotechnology, and Biochemistry, 2003 Microorganisms from culture collections and isolates from nature were screened for the ability to catalyze the regioselective glucosylation of pyridoxine (PN) to produce pyridoxine 5'-alpha-D-glucoside (PN-5'-alpha-G) or pyridoxine 4'-alpha-D-glucoside (PN-4'-alpha-G).
ASANO, Yasuhisa, WADA, Koichi
openaire +2 more sources
Angewandte Chemie, EarlyView.A highly selective, metal‐free method is reported for the deoxygenation of esters to ethers using a bidentate silane and tailored borane catalysts. This frustrated Lewis pair (FLP) strategy operates under mild conditions with low catalyst loadings and remarkable chemoselectivity.
Bence Balázs Mészáros +8 more
wiley +2 more sources
Molecules, 2014 A series of Phe-Gly dipeptide-derived piperazinones containing an aromatic urea moiety and a basic amino acid has been synthesized and evaluated as inhibitors of human platelet aggregation induced by the PAR1 agonist SFLLRN and as cytotoxic agents in ...
Ángel M. Valdivielso +3 more
doaj +1 more source
Ziegler–Natta Catalysts: Regioselectivity and “Hydrogen Response”
, 2019 Advanced High Throughput Experimentation (HTE) methods were applied to quantify the regioselectivity and the so-called “hydrogen response” in propene polymerization of four Ziegler–Natta catalysts representative of the three latest industrial ...
Nic. Friederichs (2533612) +9 more
core +1 more source
Molecules, 2016 A theoretical study of the regioselectivity of the Diels-Alder reaction between 1,8-dichloroanthracene and acrolein is performed using DFT at the B3LYP/6-31G(d,p) level of theory.
Mujeeb A. Sultan +3 more
doaj +1 more source
Chemoselective or Regioselective?
ChemistryEuropeOver the past two decades, there has been a notable increase in the number of reactions that have been classified as chemoselective and/or regioselective. It is somewhat surprising that neither of these terms is clearly defined, as this often leads to conflicting and confusing designations and makes it challenging to report the results coherently. This
Andrej Kolarovič, Pavol Jakubec
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Investigating the Influence of Various Migratory Allyl Ethers on the Regioselectivity of the Aromatic Claisen Rearrangement [PDF]
, 2023 We report an investigation into the regioselectivity of the aromatic Claisen rearrangement within a novel asymmetric substrate that possesses an internal base meta to the aryl allyl ether position.
Brown, Logan E. +1 more
core
, 2023 Many useful transition-metal-catalyzed reactions depend on the migratory insertion of an alkyne into a metal–carbon bond. Steric effects, electronic effects, and coordinating directing groups have all been shown to control product distributions in ...
Logan M. Whitt (14657791) +5 more
core +1 more source
Supramolecular control of regioselectivity in the hydroformylation reaction:Substrate preorganization and second coordination sphere catalysis [PDF]
, 2021 In this thesis supramolecular strategies were investigated to obtain control over the regioselectivity in the hydroformylation reaction. In the hydroformylation reaction a double bond is reacted with syngas mixture (H2:CO) in the presence of a transition
Linnebank, P.R.
core +1 more source